December Severe Cold Spell Thread

It's going to be an interesting couple of days ahead!  I suspect we all may see some surprises in some shape or form.  Scooting around the various threads on the various forums there's still lots of disagreement and variability banding around as to the specifics of the next several days (other than its going to be pretty darn cold!) - sooooooo, I suspect it's going to be a case of watching the radar and the satellite and getting back to a good old bit of now casting